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20- 3

ALGBR Mode Commands

u u u u u Sequence —— (sequ)

This command creates the function that describes the relationship between the

variable and the value of the expression, if the value of the expression is entered

when the variable is assigned the first specified <value>, the second specified

<value>, and so on.

• The function is a linear algebra expression.

Syntax 1: sequence ({<value>, <value>, ...} [,<variable>] [)]

• A default variable of X is used when specification of a variable is skipped.

Example

• If List 1 = {23, 30, 37, 45}, the same result can be obtained by inputting the

Syntax 2: sequence ({<value>, <value>, ...},{<value>, <value>, ...} [,<variable>] [)]

The values input with this syntax are handled as lists, with the first value of the

first list paired with the first value of the second list, the second value with the

second value, and so on. This syntax creates a function using this relationship.

Example

• If List 1 = {2, 4, 6, 8} and List 2 = {23, 30, 37, 44}, the same result can be

u u u u u Sum of Sequence —— (smSq)

This command obtains a function that expresses the sum up to the

sequence of numbers.

• The function is a linear algebra expression.

To obtain the expression when 1 through 4 is {23, 30, 37, 45}

6(g)4(PTS')1(sequ)

!{cd,da,dh,

ef!},aNw

following: sequence(List 1, N).

To obtain an expression for variable values {2, 4, 6, 8} and

expression values {23, 30, 37, 44}

6(g)4(PTS')1(sequ)

!{c,e,g,i

!},!{cd,da

,dh,ee!},

aNw

obtained by inputting the following: sequence(List 1, List 2, N).

N 3

53N

– N 2 +

+ 15

7N + 16

th term of a

358